SERVICE MANUALports are needed with all sizes of tubing except 1/8" O.D.if compression-type fittings are used.Once the tubing has been connected and tightenedthe sleeve has been crimped on the tubing and insert.Since the sleeve has been compressed and distortion ofthe insert may have resulted, thesleeveandinsertsshouldneverbeusedthesecondtime.To assemble tubing ends for use with compression-type fittings, the following steps should be followedcarefully.1.Loosen and remove nut from fitting.2.Pull tubing from fitting.3.Repeat the same operations at other end oftubing. If only one end of line needs repairing,second end need not be disconnected if line islong enough to permit repairing.4.Cut the selected size of tubing to length. Besure to make smooth, square cuts. Either asharp knife or hack saw may be used.5.Position nut on tube.6.Position compression sleeve on tube.*7.Insert tube support into tube.*8.Position the tube, support and sleeve in thefitting. Push tube in fitting untilitbottoms.9.Then install and tighten tube nut to securesleeve on tubing.10.Inspect tubing connections for air leakage. Withthe tubing and associated fittings charged to fullsystem air pressure coat tubing lines and fittingswith soap suds to check for leakage. No leakageis permissible. Leakage at a tubing fitting issometimes corrected by tightening the tubingfitting nut. If this fails to correct the leakage,replace the tubing fitting, tubing, or both.* No tube support is used with 1/8" O.D. tubing. Certainfittings used in accessory piping systems have the tubesupport as an integral part of the fitting body. Thesefittings may be reused if no distortion of the tubesupport has occurred.NYLON TUBING SPECIAL INSTRUCTIONSFor the present this nylon tubing should not besubstituted in the field for any metallic tubing. In addition,the following precautions must be taken in the use ofnylon tubing.Fig. 6 Nylon Tubing Assembly1Fitting2Tube Support or Insert3Sleeve4Short Nut5Long Nut6Nylon Tubing1.Do not use nylon tubing for any application whichwould cause it to be exposed to temperaturesbelow -40 degrees C or +I 11 degrees C (-40degrees F or above +200 degrees F).2.Do not subject nylon tubing to working pressurein excess of 1034 kpa (150 psi).3.Do not use nylon tubing for frame-to-axle,tractor-to-trailer or any similar line where a highdegree of flexibility is required.4.Observe extreme care when welding near nylontubing. Hot slag or spark will damage the tubing.5.Protect nylon tubing from battery acid.Fig. 7 Nylon Tubing Assembly Cross Section1Fitting2Short Nut3Nylon Tubing4Sleeve5Tube Insert or SupportCTS-4079 - CHAPTER XII - Page 5